Re: [Pharo-dev] Hello, Im and a litle confused. Can you help me get started please?

[James Foster]

Hi Photon,

A good place to start would be http://pharo.org/  and then 
look for the link to the Pharo Mooc. 

Cheers,

James

> On Jan 8, 2018, at 12:54 AM, Photon  wrote:
> 
> Hello, Folks. As is wrote in the title, I`m somewhat confused.  I`m new to
> programming but I think I understood what OOP is, yessterday before I
> discovered Pharo, was I was able to build a simple city model in Visual
> Studio (C#), with a city class which was build out of other classes wich
> were build out of other classes. 
> City<-District<-Street<-House<-Room. So I get the idea that we want to
> discribe real world systems as network of objects to be able to solve
> problems within givin system.
> 
> However I have a super hard time to grasp Pharo for some reason. What I
> understood so far is that everything is an object even the classes it self,
> wich  is super cool by the way. I understand that as I use Pharo I have to
> use the libaries aswell since there is no clear cut between language and
> package.
> I know the browser to a slight degree and I read allready a bit code from
> some objects and methods. 
> But then when i try to call some methods from the classes there I  fail 90%
> of the time. 
> 
> I did not find much learning material online. Only a couple talks on Pharo
> and one or two text based tutorials wich were unfortunatly pretty old,
> version 1.5 or something like this.
> So I really want to dig into this wonderfull subject as the concept seems
> fascinating to me. I believe it can be a powerfull tool especially with the
> abillity to change things runtime.
> 
> I`d be glad to get a little advice on how to start.
> Cheers
> 
> 
> 
> 
> --
> Sent from: http://forum.world.st/Pharo-Smalltalk-Developers-f1294837.html
> 
> 

Re: [Pharo-dev] Hello, Im and a litle confused. Can you help me get started please?

[Max Leske]

Hi, welcome to Pharo!

This is the development list for Pharo; your question is better suited for
the users list (
http://lists.pharo.org/mailman/listinfo/pharo-users_lists.pharo.org).
There's also a very active Discord community: http://discord.gg/Sj2rhxn.

As for documentation, there are loads of tutorials and screencasts here:
http://pharo.org/documentation.


Cheers,
Max

On 8 January 2018 at 09:55:23, Photon (nico-br...@live.de) wrote:

Hello, Folks. As is wrote in the title, I`m somewhat confused. I`m new to
programming but I think I understood what OOP is, yessterday before I
discovered Pharo, was I was able to build a simple city model in Visual
Studio (C#), with a city class which was build out of other classes wich
were build out of other classes.
City<-District<-Street<-House<-Room. So I get the idea that we want to
discribe real world systems as network of objects to be able to solve
problems within givin system.

However I have a super hard time to grasp Pharo for some reason. What I
understood so far is that everything is an object even the classes it self,
wich is super cool by the way. I understand that as I use Pharo I have to
use the libaries aswell since there is no clear cut between language and
package.
I know the browser to a slight degree and I read allready a bit code from
some objects and methods.
But then when i try to call some methods from the classes there I fail 90%
of the time.

I did not find much learning material online. Only a couple talks on Pharo
and one or two text based tutorials wich were unfortunatly pretty old,
version 1.5 or something like this.
So I really want to dig into this wonderfull subject as the concept seems
fascinating to me. I believe it can be a powerfull tool especially with the
abillity to change things runtime.

I`d be glad to get a little advice on how to start.
Cheers




-- 
Sent from: http://forum.world.st/Pharo-Smalltalk-Developers-f1294837.html

Re: [Pharo-dev] Hello, Im and a litle confused. Can you help me get started please?

[Ben Coman]

On 8 January 2018 at 16:54, Photon  wrote:

> Hello, Folks. As is wrote in the title, I`m somewhat confused.  I`m new to
> programming but I think I understood what OOP is, yessterday before I
> discovered Pharo, was I was able to build a simple city model in Visual
> Studio (C#), with a city class which was build out of other classes wich
> were build out of other classes.
> City<-District<-Street<-House<-Room. So I get the idea that we want to
> discribe real world systems as network of objects to be able to solve
> problems within givin system.
>
> However I have a super hard time to grasp Pharo for some reason. What I
> understood so far is that everything is an object even the classes it self,
> wich  is super cool by the way. I understand that as I use Pharo I have to
> use the libaries aswell since there is no clear cut between language and
> package.
> I know the browser to a slight degree and I read allready a bit code from
> some objects and methods.
> But then when i try to call some methods from the classes there I  fail 90%
> of the time.
>

Be aware that there are methods on the "instance-side" of a class
and also on the "class-side" of a class.  One way to think about the
class-side
is as an implementation of the Factory Pattern.  Since classes are objects
too,
essentially every class in the system has an associated factory-object.
An important class-side factory method is #new. Send this to a class to
get an instance of that class, on which you can invoke instance-side
methods.


>
> I did not find much learning material online. Only a couple talks on Pharo
> and one or two text based tutorials wich were unfortunatly pretty old,
> version 1.5 or something like this.
> So I really want to dig into this wonderfull subject as the concept seems
> fascinating to me. I believe it can be a powerfull tool especially with the
> abillity to change things runtime.
>
> I`d be glad to get a little advice on how to start.
>
>
Do the MOOC and the Pharo By Example book.
http://pharo.org/documentation

cheers -ben

Re: [Pharo-dev] Hello, Im and a litle confused. Can you help me get started please?

[Stephane Ducasse]

You can access all the material of the Pharo Mooc at http://mooc.pharo.org
If you can something in C# you should be able to do it in Pharo simply too.

I do not understand your City<-District notation but if it means that
a city has many districts
here is the way we express it in Pharo



Object subclass: #City
instanceVariableNames: 'districts'

City >> initialize
super initialize.
districts := OrderedCollection new.

City >> addDistrict: aDistrict
   districts add: aDistrict


Object subclass: #District
instanceVariableNames: '...'


You may want to read my latest book on Understanding OOP in Pharo
available at http://books.pharo.org

Good luck

Stef

On Mon, Jan 8, 2018 at 9:54 AM, Photon  wrote:
> Hello, Folks. As is wrote in the title, I`m somewhat confused.  I`m new to
> programming but I think I understood what OOP is, yessterday before I
> discovered Pharo, was I was able to build a simple city model in Visual
> Studio (C#), with a city class which was build out of other classes wich
> were build out of other classes.
> City<-District<-Street<-House<-Room. So I get the idea that we want to
> discribe real world systems as network of objects to be able to solve
> problems within givin system.
>
> However I have a super hard time to grasp Pharo for some reason. What I
> understood so far is that everything is an object even the classes it self,
> wich  is super cool by the way. I understand that as I use Pharo I have to
> use the libaries aswell since there is no clear cut between language and
> package.
> I know the browser to a slight degree and I read allready a bit code from
> some objects and methods.
> But then when i try to call some methods from the classes there I  fail 90%
> of the time.
>
> I did not find much learning material online. Only a couple talks on Pharo
> and one or two text based tutorials wich were unfortunatly pretty old,
> version 1.5 or something like this.
> So I really want to dig into this wonderfull subject as the concept seems
> fascinating to me. I believe it can be a powerfull tool especially with the
> abillity to change things runtime.
>
> I`d be glad to get a little advice on how to start.
> Cheers
>
>
>
>
> --
> Sent from: http://forum.world.st/Pharo-Smalltalk-Developers-f1294837.html
>

Re: [Pharo-dev] Hello, Im and a litle confused. Can you help me get started please?

[Dimitris Chloupis]

You got a secret weapon

A nuclear weapon

The ability to ask questions.

Anything you don’t understand ask a question
Anything you think you understand ask a question
Anything you sure you understand ask a question

Then keep asking until you fill the mailing lists with question

People hate asking questions but the love answering them ;)

On Mon, 8 Jan 2018 at 10:55, Photon  wrote:

> Hello, Folks. As is wrote in the title, I`m somewhat confused.  I`m new to
> programming but I think I understood what OOP is, yessterday before I
> discovered Pharo, was I was able to build a simple city model in Visual
> Studio (C#), with a city class which was build out of other classes wich
> were build out of other classes.
> City<-District<-Street<-House<-Room. So I get the idea that we want to
> discribe real world systems as network of objects to be able to solve
> problems within givin system.
>
> However I have a super hard time to grasp Pharo for some reason. What I
> understood so far is that everything is an object even the classes it self,
> wich  is super cool by the way. I understand that as I use Pharo I have to
> use the libaries aswell since there is no clear cut between language and
> package.
> I know the browser to a slight degree and I read allready a bit code from
> some objects and methods.
> But then when i try to call some methods from the classes there I  fail 90%
> of the time.
>
> I did not find much learning material online. Only a couple talks on Pharo
> and one or two text based tutorials wich were unfortunatly pretty old,
> version 1.5 or something like this.
> So I really want to dig into this wonderfull subject as the concept seems
> fascinating to me. I believe it can be a powerfull tool especially with the
> abillity to change things runtime.
>
> I`d be glad to get a little advice on how to start.
> Cheers
>
>
>
>
> --
> Sent from: http://forum.world.st/Pharo-Smalltalk-Developers-f1294837.html
>
>

Re: [Pharo-dev] Hello, Im and a litle confused. Can you help me get started please?

[Photon]

Wow im mindblown. The famous Stephane Ducasse answered me himself :) 
I watched a couple of talk you gave on Pharo. I followed your dice example
wich helped me alot to understand. By now im much more into it then a few
days ago when i wrote my request. Still I`m new to programming so I cant do
anything usefull yet. 

For my example with the city i
I meant that each class contained a dynamic list of other classes like city
had a member districts wich was a list of district classes and so on. I`m
not even sure if that is a good thing to do or if a real developer would
realize the city mode in a different way.

Anyways I feel like i know how to proceed now, and have a bit better
understanding of the syntax and this whole object-message concept. Thank you
for your reply mr Ducasse ;)




--
Sent from: http://forum.world.st/Pharo-Smalltalk-Developers-f1294837.html

Re: [Pharo-dev] Hello, Im and a litle confused. Can you help me get started please?

[Stephane Ducasse]

You are welcome :)

Take the time and learn. Pharoers are nice.
And get better and better and Pharo will change your life and your way
to program in any OOP language.
The "learning OOP" book that I wrote can teach you already some nice
parts of OOP
http://books.pharo.org

Stef


On Wed, Jan 10, 2018 at 3:38 PM, Photon  wrote:
> Wow im mindblown. The famous Stephane Ducasse answered me himself :)
> I watched a couple of talk you gave on Pharo. I followed your dice example
> wich helped me alot to understand. By now im much more into it then a few
> days ago when i wrote my request. Still I`m new to programming so I cant do
> anything usefull yet.
>
> For my example with the city i
> I meant that each class contained a dynamic list of other classes like city
> had a member districts wich was a list of district classes and so on. I`m
> not even sure if that is a good thing to do or if a real developer would
> realize the city mode in a different way.
>
> Anyways I feel like i know how to proceed now, and have a bit better
> understanding of the syntax and this whole object-message concept. Thank you
> for your reply mr Ducasse ;)
>
>
>
>
> --
> Sent from: http://forum.world.st/Pharo-Smalltalk-Developers-f1294837.html
>

Re: [Pharo-dev] Hello, Im and a litle confused. Can you help me get started please?

[Photon]

oh yes I allready started with the book as I decided that it looked the most
usefull and complete of the available material online. I did not know that
you wrote it. TDD is a fun topic aswell. 
I have a little question tho. Am I supossed to know all the answers in
Chapter 3 challenges? Should I redo chapter 1-2 untill I know all the
answers?

Cheers



--
Sent from: http://forum.world.st/Pharo-Smalltalk-Developers-f1294837.html

Re: [Pharo-dev] Hello, Im and a litle confused. Can you help me get started please?

[Christophe Demarey]

Hi,


> Le 11 janv. 2018 à 11:35, Photon  a écrit :
> 
> oh yes I allready started with the book as I decided that it looked the most
> usefull and complete of the available material online. I did not know that
> you wrote it. TDD is a fun topic aswell. 
> I have a little question tho. Am I supossed to know all the answers in
> Chapter 3 challenges? Should I redo chapter 1-2 untill I know all the
> answers?

I think you should be able to answer most questions of the chapter 3 before 
going further.
Be able to identify messages, literals and evaluating basic expressions is 
really important. If you only miss a few answers, it is not a big deal. They 
will come with experience.
My advice would be to not only re-read the book but use Pharo playground / 
inspector in the same time to try the examples and find out similar ones.

Regards,
Christophe

Re: [Pharo-dev] Hello, Im and a litle confused. Can you help me get started please?

[Stephane Ducasse]

Since the syntax of pharo is heavly based on messages, it is important
for you to spot them.

Stef

On Thu, Jan 11, 2018 at 1:58 PM, Christophe Demarey
 wrote:
> Hi,
>
>
>> Le 11 janv. 2018 à 11:35, Photon  a écrit :
>>
>> oh yes I allready started with the book as I decided that it looked the most
>> usefull and complete of the available material online. I did not know that
>> you wrote it. TDD is a fun topic aswell.
>> I have a little question tho. Am I supossed to know all the answers in
>> Chapter 3 challenges? Should I redo chapter 1-2 untill I know all the
>> answers?
>
> I think you should be able to answer most questions of the chapter 3 before 
> going further.
> Be able to identify messages, literals and evaluating basic expressions is 
> really important. If you only miss a few answers, it is not a big deal. They 
> will come with experience.
> My advice would be to not only re-read the book but use Pharo playground / 
> inspector in the same time to try the examples and find out similar ones.
>
> Regards,
> Christophe